Add date function to get current date without time component (#1937)

* #1936 Add date function to get current date without time component
- Add CURDATE method to AlaSQL
- Add test

* #1936 Add date function to get current date without time component
- Support dateAsString option
- Extend tests

* #1936 Add date function to get current date without time component
- Add CURRENT_DATE alias
- Extend test

* - Fix running the parser in package.json
- Add rebuild parser documentation
- Add CURDATE/CURRENT_DATE to parser definition
- Allow both with and without parenthesis
- Adjust test

* - Use tabs

* - Use alias to prevent duplicate code for CURRENT_DATE

* - Update dependencies

README.md

@@ -629,6 +629,15 @@ AlaSQL is an [OPEN Open Source Project](http://openopensource.org/). This means
 
 We appreciate any and all contributions we can get. If you feel like contributing, have a look at [CONTRIBUTING.md](https://github.com/alasql/alasql/blob/develop/CONTRIBUTING.md)
 
+## Rebuilding the parser 
+
+To rebuild the parser, follow these steps:
+
+* Make changes to alasqlparser.jison
+* `npm install -g jison`
+* `npm run jison`
+* `npm test` to validate the changes made
+* Commit changes to alasqlparser.jison and alasqlparser.js
 
 ## Credits
 

package.json

@@ -15,15 +15,15 @@
 	"scripts": {
 		"test": "sh build.sh && yarn test-only",
 		"test-ci": "(yarn test-format || 1) && yarn test && yarn install-g && alasql 'select 1 as Succes'",
-		"test-only": "mocha ./test --reporter dot # npx bun node_modules/.bin/mocha ./test --reporter dot",
+		"test-only": "node node_modules/mocha/bin/mocha.js ./test --reporter dot",
 		"#test-only": "(command -v bun && bun node_modules/.bin/mocha ./test --reporter dot) || npx bun node_modules/.bin/mocha ./test --reporter dot",
 		"test-browser": "node test/browserTestRunner.js 7387",
 		"test-cover": "# istanbul cover  -x 'lib/zt/zt.js' --dir test/coverage _mocha",
 		"build": "yarn format && yarn build-only",
 		"build-only": "sh build.sh",
 		"install-g": "yarn build && npm uninstall alasql -g && npm install -g .",
 		"release": "yarn version",
-		"jison": "npx jison-gho ./src/alasqlparser.jison -o ./src/alasqlparser.js",
+		"jison": "jison ./src/alasqlparser.jison -o ./src/alasqlparser.js",
 		"fmt": "yarn pretty-commit --write",
 		"format": "yarn pretty-since-dev --write",
 		"format-all": "yarn pretty-all --write",
@@ -62,7 +62,7 @@
 		"eslint-plugin-promise": "6.1.1",
 		"git-branch-is": "4.0.0",
 		"husky": "8.0.3",
-		"jison-gho": "^0.6.1-216",
+		"jison": "^0.4.18",
 		"lint-staged": "15.2.2",
 		"mocha": "10.4.0",
 		"mocha.parallel": "0.15.6",
@@ -72,7 +72,7 @@
 		"react-native-fs": "^2.20.0",
 		"rexreplace": "7.1.3",
 		"strftime": "0.10.2",
-		"tabletop": "1.6.3",
+		"tabletop": "^1.6.2",
 		"uglify-js": "3.17.4"
 	},
 	"resolutions": {

src/61date.js

@@ -73,6 +73,25 @@ stdfn.NOW = function () {
 stdfn.GETDATE = stdfn.NOW;
 stdfn.CURRENT_TIMESTAMP = stdfn.NOW;
 
+/**
+ * Returns the current date, without time component.
+ * @returns date object without time component
+ */
+stdfn.CURDATE = stdfn.CURRENT_DATE = function () {
+	var date = new Date();
+	date.setHours(0, 0, 0, 0);
+	if (alasql.options.dateAsString) {
+		var s =
+			date.getFullYear() +
+			'-' +
+			('0' + (date.getMonth() + 1)).substr(-2) +
+			'-' +
+			('0' + date.getDate()).substr(-2);
+		return s;
+	}
+	return date;
+};
+
 // 	stdfn.GETDATE = function(){
 // 		var d = new Date();
 // 		var s = d.getFullYear()+"."+("0"+(d.getMonth()+1)).substr(-2)+"."+("0"+d.getDate()).substr(-2);

src/alasqlparser.jison

@@ -104,6 +104,8 @@ COLUMNS 										return 'COLUMN'
 "CROSS"											return 'CROSS'
 'CUBE'											return 'CUBE'
 "CURRENT_TIMESTAMP"								return 'CURRENT_TIMESTAMP'
+"CURRENT_DATE"									return 'CURRENT_DATE'
+"CURDATE"										return 'CURRENT_DATE'
 "CURSOR"										return 'CURSOR'
 DATABASE(S)?									return 'DATABASE'
 'DATEADD'                                       return 'DATEADD'
@@ -1259,6 +1261,8 @@ Expression
 		{$$ = $1}
 	| CURRENT_TIMESTAMP
 		{ $$ = new yy.FuncValue({funcid:'CURRENT_TIMESTAMP'});}
+	| CURRENT_DATE
+		{ $$ = new yy.FuncValue({funcid:'CURRENT_DATE'});}
 /*	| USER
 		{ $$ = new yy.FuncValue({funcid:'USER'});}
 */	;
@@ -1313,6 +1317,8 @@ PrimitiveValue
 		{ $$ = $1; }
 	| CURRENT_TIMESTAMP
 		{ $$ = new yy.FuncValue({funcid:'CURRENT_TIMESTAMP'}); }
+	| CURRENT_DATE
+		{ $$ = new yy.FuncValue({funcid:'CURRENT_DATE'}); }
 /*	| USER
 		{ $$ = new yy.FuncValue({funcid:'USER'}); }
 */	;
@@ -1387,6 +1393,8 @@ FuncValue
 		{ $$ = new yy.FuncValue({ funcid: 'IIF', args:$3 }) }
 	| REPLACE LPAR ExprList RPAR
 		{ $$ = new yy.FuncValue({ funcid: 'REPLACE', args:$3 }) }
+	| CURRENT_DATE LPAR RPAR
+		{ $$ = new yy.FuncValue({ funcid: $1 }) }
 	| DATEADD LPAR Literal COMMA Expression COMMA Expression RPAR
 		{ $$ = new yy.FuncValue({ funcid: 'DATEADD', args:[new yy.StringValue({value:$3}),$5,$7]}) }
 	| DATEADD LPAR STRING COMMA Expression COMMA Expression RPAR